1. Facebook has no plans to start charging for its services at this time. They make enough from advertising that they do not need to. Therefore, there is no need to fly into a panic and join groups to stop them from charging $3.99, $4.99, $14.99, or 15 British pounds per month. Even if Facebook did plan on charging monthly fees, joining a group would have no effect whatsoever. In fact, most of these groups contain malware and should be avoided at all costs.
2. The status about Patrick Swayze, Michael Jackson, and President Obama being your favorites is a JOKE--albeit a tacky and tasteless one--and should hardly be interpreted as a serious petition for God to strike the man dead. There isn't really a group of people who meet regularly to pray for Obama's death. God knows the difference between a prayer and a snark. Get a grip, people.
3. Failure to uncheck the "allow" box in your privacy settings will NOT release your birth certificate, social security number, bank account numbers, medical records, or your secret FBI files to the general public. All this box does is to allow other sites that you visit to read the information you have already and voluntarily made PUBLIC on Facebook so that they can select ads based in your interests. And if you set your Facebook profile to private, there is really very little information they can glean as it is. If you are that secretive, perhaps you shouldn't be on a PUBLIC site like Facebook at all.
There, I feel much better now.